Filler tube and plug



Nov. 3, 1925.

a. E. HUBBARD FILLER TUBE AND PLUG Filed Dec. 1924 Patented Nov. 3,1925.

' UNITED STATES PATENT OFFICE.

GEORGE E. HUBBARD, or HASTINGS, MINNESOTA.

FILLER TUBE AND PLUG.

Application filed December 20, 1924. Serial No. 757,294.

The object of the invention is to pro-.

vide a simple, efiicientand inexpensive filler tube and plug of suchconstruction that the latter is readily placed in or removed from thefiller plug, is rigidly in place when in the tube but readily removablewith little effort.

In the accompanying drawing Fig. 1 is a front elevation of the upperportion of an automobile radiator with my improved filler tube and plugin its top part.

Fig.2 is an enlarged sectional elevation as on line 22 in Fig. 1 showingmy improved filler tube and plug in complete diametric section andapproximately full size.

Referring to the drawing by reference letters A designates a radiator ofthe type common to most automobiles and in the top thereof a fixedfiller tube B. Said tube in most cases is provided with female threadsfor receiving a threaded cap (not shown). My improved plug and tube haveno threaded parts, the tube B being plain and projecting down into theupper water reservoir C of the radiator (see Fig. 2) and its upper endbeing provided with a flange D.

The plug itself comprises a tube E of a size to be slidably inserted intube B and of about same length as the latter. The upper end of the plugcomprises preferably an integral enlarged and hollow head F 'with acircular shoulder F on which is suitably retained a gasket G (Fig. 2)preferably of rubber to engage flange D. The extreme outer edge of thehead, as F, may be milled about as shown to provide a good hand hold, orsaid part F may be made polygonal (not shown) for the same purpose.

Near the lower end of thefixed tube B is provided a circular inwardlydirected ridge or groove B and tube E is provided with a like groove Eadapted to frictionally 'en- 4 gage the groove-ring B when tube B is inplace with its shoulder F and gasket G pressed against flange D. Thelower end of tube E is provided with a plurality of slits H cutlongitudinally some distance up from the lower end of the tube andforming a number of resilient circularly arranged tongues J. Thesetongues will spring or yield inwardly enough to let the grooved part Epass over thevstationary grooved part B of tube B vertically, eitherwhen the plug is inserted or withdrawn from tube B. When said ridged orgrooved parts E have passed ridge E during insertion of the I plug theyspring back to normallinear relae tion to the tubular wall of the tubeand the entire plug is frictionally held in place, as shown in Fig. 2.Removing of the plug is accomplished best by the operator grasping thehead-F firmly, twisting the plug and simultaneously pulling upwardly.

What I claim is: i

In a filler tube plug for containers the combination of a fixed tube inthe container and communicating with the interior thereof, a filler plugcomprising atubular body tube, an enlargement on the plug adapted toserve as a hand hold, said fixed tube having a circular inwardlydirected groove'adjacent its inner end and said tubular bodyof the plughaving a circular inwardly directed adapted to be slidably inserted insaid fixed groove portion adapted to frictionally engage the firstmentioned groove and yieldable means for disengaging said grooved partsto release the plug, said disengaging means consisting of a number ofcircularly arranged, elongated resilient tongues formed of the lower endof said plug by cutting slits longitudinally therein from its'bottoniend. i

In testimony whereof I affix my signature.

GEORGE E. HUBBARD.

